Control for motor-operated toaster



Feb. 4, 1958 p. A. GUSTAFSON CONTROL FOR MOTOR-OPERATED TOASTER 2 Sheets-Sheet 1 Filed March 25. 1954 INVENTOR jwdaw zdfiow Feb. 4, 1958 Filed March 25. 1954 504 J90 J54 5Z5 E14 Tim E15 D. A. GusTAFsoN CONTROL FOR MOTOR-OPERATED TOASTER 2 Sheets-Sheet 2 INVENTOR.

fizz/ZZZ d. 6245222540;

ooNTRoL FoRMoToR orERArED TOASTER' David A. Gustafson; Elgin, 11L, assignor to McGraw- Edison .Gompany, .arcorporation of- Delaware Application March 23, 1954', S'erial'No. 418,177 6' Claims.. (Gk 99,-329) nveutionis. concerned with.a..toaster, -andz-more particularly with a control for a motor-operated toaster. In electrically heated to,as.ters,.,.itz is. standard practice to. connect the heati'ng elements directly acrossthe. power line. The heating elements.- ofiten are. relatively cold whenth s is done, and thus,.have.their. lowest resistance.

The .suddden application of the entirezline voltageacross in dimensions, and the ,rapidchange ,in temperature and dimensions tends to shortentheusefuLlife.ofltheheating elements. to -a significant extent.

If the voltage .andcurrentapplied to. theeheatingelements could be. increasedrgradually, or in. steps-,: tthe life of the heating elements could be materially prolonged. For a sudden change of ,energ'ization- (.as..when--- closing a .switch) the, temperature rises approximately one rlogarithmicdecay, curve of the shape. (l -er), Theneiore, the maximum rateof. temperature rise inany step ds roughly proportional to the size of the stepin-watts:

In prior toasters .it has.not been feasible to introduce any extra apparatus .such as a a resistor. and switch-i for preheating the. heating elements, as this woulrl substantialr .ly increase the, costof thetoasterand would make. itsmore complicated. and more tdifiicult to produce; andzawtould make it more prone to operational disorders.

It is an object ofthis,inventiontoprovide apprehening gtep ina toaster withoun-the. disadvantages-s above note More specifically, it \is an, object oi thisainventioneto provide a preheating step .in,an..automatic toaster W th.- out the necessity. of. providing additional,- parts inwthe toaster.

In the most. advanced automatic/toasters, itisunnecessary for the person using the. toaster '.-to exert any manual efiort suchras .fonlowering; a toast .carrying: ;meehanisnr. All that ,is necessary .is to, drop; slices .of bread; inuthe toaster. Such slices of bread act through;an;:appro.- priate. mechanism to, closea switch. torcause arsmallrn'rotor to lower the toast carrying mechani mh The'toast .canrying mechanismisraised .to. itssoriginalippsition by;-,suitable ,spring ,means at the. .end of: .aetoastinggoperation:

It is .an object o,..this..inventio1r.-.to. provide a;.:mo tor operated a toaster 3 wherein the. motor; and" timengare :op a edin series with .the .heating e'lements'rto.reducerthe initial enersizatiouof ,therheating elements;

It is. a further. object of..this;inyention to :provideva motor operated. toasterof. the foregoing character where.- in the maximum. rates zof temperature rise ofcthe heating elements when .in series: with,- the ,motor -and' following the operation. of; the motor when :,the.-:.mot or,-isriout :of the circuit are approximately equal.

Other; and further:;ohjeotszaandoadvantages;tof ttherprescut invention will bet-apparent from-tthe= following do United States Patent: O

2,821,902 Patented Feb. 4,. W58

scriptiorrwhentakenin connectionrwith the accompanying "ice drawings; wherein:

Fig. Lisa-fragmentary perspective view of a toaster embody ng t e principles of the invention with part of .and firstto'Fig. .1, therewillibe seenawtoaster20 including the usual frame 22 towhieha housinggcasing, or ashell..24.-is.secured by'any suitable means such as sheet metal screws- :(not ,shown)... Thermal insulating end piecesz26, suchra slmolded plastic,.are secured to the easing by suitable meansranddnclude handles'28- for .lifting-thetoaster. Rubber-orr other resilient, non-marring feet. (not shown); preferably are mounted beneath the thermal}end, pieces=.26r-for1supporting the toaster onthe table-orathe like The. toaster, is provided xwith-toasting ovens 31:-including a-pair. ofrsp aced aga-rhendplates-SZ .(only one being shown) extendi-ng upwardly from -.theframerztl to which they;are.securerhby;- any known-,orrsuitablemeans. Four angle bars 34 extend between the end pieces 32,.and'insulating pieces-,36-. made.of some suitablermaterial such as porcelaintarelcarried by-the'anglebars 34 and support the topzedges.of-mica.sheets 38.- The heating. elements .orrtoasting coils 40 are wound-onthese: mica sheets, and preferably are. formed of the usual flat ribbon orresistance. wire commonly used .for such toasting; coils-zor heating elements. The lower edgestof'thermica;sheets:.are supported; from r the frame :20*by-- means i of suitablesinsul ating pieees 42, and certain: of :fllfiSCrPlBCGS also serve to. provide insulating mounts. for terminals 44* Ofi. the toastenwindingsror heating'elements.

,The .mica :sheets 38" are provided-in the: usual spaced apart pairs, and: elongated slots. 46 --are ;provided:tinuthe top of .the. casing: to allow insertion. andr removal of the breadiinto and .from' tthe toastingeven :provided: by 'ithe heating-;elements -.and.mica. sheets. -Wire :spacers:48:;:of the-,usual, zigzag-configuration extend fromv the. angle bars- 34 down.to-suitable;tabs 50:01: the lower 2fI3IlI61'SLlltably to space bread slices from th'efitoastin'g;coils '4fleon thetmicasheetsr Suitable-operating means r52 arefmounted on tliet right.- hand. end-plate- 32 random thee-frame .22 immediately adjacent. thereto The-operating means. 52 includeslaibnacket 5.4aafiixed to. thetrightahand.endplate 32.- The: bracket 54esupports the upper1end-0f-the carriage:rod-156; the lower .end rbeing; suitably carried-by;- the-frame 20. A ,spring .(not shown) :encircles the upper end of the rod 56 immediately beneath .its mounting :on' the bracket '54 to:provides arresilientstop er shock" absorber for s the carriageshereinafter .to be disclosed.

A-carriage62 (seealso Fig. 3) istslidablwmounted on the rodzsfi andsincludesz a verticle fangle piece z64 having upper. and: lower. horizontalrflanges (not showm) provided with aligned apertures and suitable bushingsyand bearings (not .shown) d which. slidably mount the marriage, on: the rod56i:

-Arhorizontal .pivotrod 72-(Figsnl anda3) is'rsuitably carriedz-by the -.carriage 62- '-and pivotally mounts a rec tangulanzj boxeshapedcbracket- 74. This bracket carries apair of :breadontoast carriers-76 whichare' afiixed theretoninaanyasuitable manner. The twoto'ast carriers or each take tthe rfdrrrr of--an elongated arm; the outermost "end of which extends through a "guide slot (not shown) in the left end wall 32 (not shown). Spaced lugs or cars 80 are provided on the arms and are integral therewith, extending laterally at an angle thereto, suitably to support bread slices.

A rack 82 is mounted on one side of the vertical angle member 64 of the carriage 62, and is preferably mounted thereon for limited vertical movement relative to the angle member by means of pins 84 on the rack slidably fitting through vertically elongated slots 86 in the side of the angle member. Opposed coil springs 88 are anchored to the pins and to an intermediate lug 90 on the angle member midway between the slots 86.

A motor 92 is mounted on the end plate 32 by means of a bracket 94 suitably carried from the bracket 54. The lower end of the bracket 94 is supported by means of another bracket (not shown) carried from the frame 22. The motor further is mounted by means of brackets, such as the bracket 104, secured to the horizontal portions of the motor frame 102.

In addition to the foregoing, the motor includes coil windings 106 positioned between suitable insulating pieces 108. The motor is provided with the usual poles and rotor (not shown) and the rotor acts through a gear train in a housing 122 to drive a pinion 124 meshing with the rack 82. When the motor is energized by means hereinafter to be set forth, it rotates the pinion 124 to lower the rack, and hence to lower the carriage and the toast carriers 76. The spring connecton of the rack to the carriage prevents undue shock from being imposed on the driving connections when the motor starts and when the carriage reaches fully raised and fully lowered positions.

A coil spring 126 (Figs. 1 and 3) is stretched between the bracket 54 and a part 128 on or associated with the lower part of the carriage 62. The spring normally holds the carriage in raised position, and is stretched as the carriage is lowered by the motor 92. The stretched spring serves to raise the carriage and the toast carriers at the end of a toasting operation.

Means is provided for latching the carriage in lowered position and comprises a latch bar 130 as shown in Figs. 1 and 3. The latch bar is provided with a pair of upstanding ears 132, and this pair of ears is pivotally mounted on the pin 134 between a pair of cars (not shown) upstanding from the frame 20. A finger 138 extends from the front ear 132 longitudinally of the latch bar 130 and is adapted for cooperation with a tooth 140 on the member 128 at the bottom of the carriage. The latch bar is normally biased in a counterclockwise, carriage releasing position by means of a coil spring (not shown) encircling the pin 134.

As the carriage is lowered by the motor 92, the bottom edge of the tooth 140 strikes the latch bar 130 to pivot the latch bar in a clockwise direction. This causes the finger 138 to pivot into position above the tooth 140 to hold the carriage in lowered position against the action of the spring 126. The extending end 143 of the latch bar engages the bevelled upper edge 144 of a holding detent 146 and cams the detent aside until the extending end of the latch bar has passed the tooth 148 ofthe detent. The detent is spring urged into the position shown, and the spring biasing of the detent returns it to its normal position so that the tooth 148 engages above the extending end 143 of the latch bar to hold it in the position shown in Fig. 3 with the carriage latched in lowered position.

The detent 146 is controlled by a timing mechanism (not shown) of any conventional construction, such as a thermal timing mechanism. After a predetermined toasting interval, the timing mechanism acts to withdraw the detent 146 to release the extending end 143 of the latch bar 130. The spring about the pivot of the latch bar (not shown) and the upward force exerted on the finger 138 of the latch bar by the tooth 140 of the carriage rotate the latch bar in a counterclockwise direc- 4 tion to release the carriage which is then raised by the spring 126.

The toasting interval may be varied to produce light or dark toast by rotating a knob 150 (Fig. 1) positioned externally of the toaster housing 24. This knob is fixed on a shaft 152 rotatably mounted on a plate 154 upstanding from the frame 22. An axially elongated pinion 156 is mounted on the shaft and rotates with the knob 150. The pinion meshes with a gear segment 158 on a control lever pivotally mounted on a plate 154 at 160. The opposite end of the lever is provided with a skewed tip 162 forming a cam engaging a suitable member (not shown) linked to the timing mechanism to render the timing mechanism operative to withdraw the detent after any preselected interval to release the carriage for raising the toast. The shaft 152 is axially slidable and is adapted, in response to axial pressure on the knob 150, to engage a suitable member (not shown) for manually retracting the detent 146 to effect raising of the carriage at any time.

The toaster parts heretofore disclosed are not new with this application. The invention resides in the switching mechanism hereinafter to be disclosed and in the manner in which the previously disclosed parts operate by this switching mechanism. The switch mechanism is shown physically in Figs. 1 and 3, schematically in Fig. 2, and diagrammatically in Figs. 4-10. The switch mechanism is identified generally by the numeral 164. The switch mechanism 164 comprises a first contact carrying blade 166 having a contact button 168 thereon. The contact carrying blade continues as a right angularly disposed strip 170 which is riveted or otherwise permanently secured to an insulating plate 172 as at 173. The insulating plate is riveted or otherwise permanently mounted on a vertically disposed mounting plate 174, and this mounting plate has a right angularly disposed flange 176 secured to the right-hand end plate 32, and a foot 178 secured to the frame 22. Suitable apertures are provided in the mounting plate 174 to provide clearance for the rivets or other fasteners 173, and for other fasteners as hereinafter will be apparent.

The strip 170 continues as a horizontal or offset strip 180 to the windings of the motor 92. A strip 264 is secured at its lower end to a contact returning from the motor windings, and also to the offset tip of an L-shaped strip 260 leading to the terminal 44 of the toasting oven or heating coils.

A pivot pin 182 extends transversely from the upper edge of the mounting plate 174, and a double throw switch blade 184 is pivotally mounted on this pin by means of a pair of apertured, upstanding ears 186. The blade 184 carries a lower contact 188 cooperable with the contact 168, and also carries an upper contact 190, it being understood that these contacts are connected to one another and are insulated from the arm 184. The free end of the blade 184 is provided with a tongue 192 of reduced width. A spring 194 is stretched between the blade 184 and a laterally extending ear (not shown) on the mounting plate for urging the blade downwardly.

Downward movement of the blade 184 is resisted by a retainer 198 having a central slot 200 elongated in a vertical plane and receiving the tongue 192 of the blade 184. The slot is sufiiciently wide to receive the tongue 192, but not to receive the remainder of the blade 184. The retainer 198 is pivotally mounted by means of a pair of ears 202 apertured to receive a pin 204 extending transversely from the top of the mounting plate 174. A spring 206 is stretched between the retainer 198 (shortly below the pivot thereof) and an upstanding tail 208 shortly to be described. This spring normally maintains the retainer 198 biased against the shoulders of the blade 184 where the blade is reduced in width to form the tongue 192.

An upper contact carrying blade 210 is pivotally mounted on the pin 182 along with the blade 184 by 561 208 previously mentioned i'srormd integral witli-ithe -blade 2'10, and the-top i blade} 2'10"'is"urged" toward t he ilitelmdiate blad 1 8413311116 aforementioned 'S'pi'ing 206.

Downward movement of the blade '210isliniited "by a mechanicab'stop in'a form-eta finger 214: projecting at t ,1 g m f t top of th mounting plate 174. The upper Blade 219 is provided on its "under" surface with-a contact'bu'tton 216aligned'with the button 190 on the intermediate bla de;and designed" to "contact the button 190' whentheintermediatebladeisin its raised position.

A "spring 218 isstret'ched between the top 'of the boxshaped bracket 74 and an upstan'dingtail 220 on'the'car- 7t5to the position shown in Figs. 1, 4,and '10.

'A plu'nger '222 (Figs. 1' and 3)having 'anenlarged edge of the bracket'74. fWith' the bracket 74 andc'ar'riers "head 224bf the plu'ngeris displaced slightlyfrom'the retainer 198. When the carriers and box-shapedfbracket *are'pivoted'by the weight'of the sliced bread to bring'the carriers'into horizontal position, the head 224 engages the retainer '198 to -pivotthe "retainer away from the, "tongue '1'92 of'the'intermediate blade 184 to allow the blade to' be pulled down by the spring194.

A slide 'rod 230'is'mounted'vertically'for reciprocation infaligned apertures in'an'e'ar 196 on'the'mounting plate riage "62. This spring "normallytil ts the 'bo'x-shaped abl mounted oil-th insulating plate 17; (the necessary "1" 74,and'in' another car 232 extending from'the plate 174 nearthebottom thereof. The rod is positioned beneath apart of'theintermediateblade 184 for engaging theblade 184 while clearing thefixed blade '166. A-coil "spring 234 encircles the rod and istrapped' between the -ear196and a wire clip 236 fitting in an'annular, groove iritherbdfo'r urging the rod downwardly.

The end of the latch arm130 opposite the end 143 and *hereinzifter identifiedby'the number 238 is positioned 'Tbeneaththerod 230 and is provided with a stop in the form of an enlargedhe'ad 240' on abo-lt '.(not shown) "threaded-intothe end 238 ofthelat'chbar'130. Ajam nut 244on the bolt locks "the bolt in adjusted position.

Whenfithe latch bar 130 is pivoted in a clockwise direc- 1 'tion'as'a result of'e'ngag'ement of the finger 138 thereon by th'carriage, the rod230' israised against theforce of the spring 234 to' engage and raise the central blade 184 "'aswill be pointed 'out in: greater particularity hereafter. Astrap 'likeconductor 246 leads from one of the input icon'n'ections 248 of the toaster to a bracket 2 50 mounted '"on the insulatingplate 172, a suitable aperture being pro- "vided in the mounting plate 174 tov provide .clearance for the connections 'mountingthe bracket 250. A flexible lead 254 eXtends from the bracket 250 to the uppercontact 1'90on'the intermediate blade 184, the two-contacts 188 "and 190 on this blade being electrically connected to- 'g'e't-her and-insulated from the blade184 by any suitable or convenient means (not shown).

Theother input-connection 25610 the toaster is connected by a conductor 258 to a timer 259 indicated schematically in'Fi'g. 2"as a double acting thermal timer iif known-design. The'timeris'not shown physically as "pr'eviously hasbeen indicated;-but"preferably is located within the housing -24-below the motor 92, andpreferably ll immediately below the detent 146. "The timer is connected by a conductor-indicated'schematically'in Fig. 2 at "262 to the heating or-toasting coils 40 of the oven. It will be apparenffro'm the showingin Fig. 2 that there preferably are four-toasting coils"connectedinparallel, and that'the wire 262-is connected'to'thecoils orheating elern'ents at i 'tthe oppoeite*commomendthereof from the conductor 2'60. The"'strapor'ccnductdr264i5feyious1y "indicated as '-"apei'tures* toi'tisulate the mounting means "beingprovided in the" mounting plate 174), and'theupper endofthe strap 264 is *connecte dby'm'e'ans of -a* flexible wiream *to' thecontact- 216 onthe upper blaiie" 210, the"cbntact being insulated from the blade byanysuitable or desirable means.

Operizti'on "Before thelstart-of a toasting operation, parts of the toaster are in the positions shown in Figs. 1, 4,-an'd -10. At'this time the toast carriers 76=-areinclined upwardly, and theintermediate blade "184 of the switch mechanism "164 is in a-horizontal position with the tongue l92 fitting in the s1ot200 and supported by the-retainer1-98.

When a slice of bread to be toasted is dropped through oneof "the'slots 46 upon the"corre'sponding toast carrier 76, itlpivots-the toast carrier to a horizontal position as shown in-Fig; 5. Thiscausesthehead-224- of I the' plunger 22 210 engage the side 'of the retainer 198 ne'arthe bottom thereofi and thus'to-pivotthe retainer away from the blade 184 for releasing the tongue -192--so thatthe blade 184 drops-under the force of theispring 194 to bring the contac t"1*88 into engagement-with-the'contact168. 'This completes a circuit through the field coils of the motor '92 in series withthe oven comprisingthe'he'atingelements "40-and'the timer 259. Such 'energization 'of'the' m'otor causes the motor to run tolower thercarriage by means of pinion '124 and rack 82.

As the carriage'is lowered, the plungerhead 224'passes :beyond the lower-end of-the retainer 198 as shownin v Fig. 6. This allows the spring 206 to shift the retainer Hpivots the latch bar in a clockwise directionzto engage 'the -finger -138 abovethe tooth 140 to latchthe carriage in lowered position. The clockwise pivoting of the latch 7 bar moves the end 238 thereofupwardly andbri'ngslhe enlarged bolt head 240 into engagement with the slide rod 230 to shift the same upwardly against 'the fome of the spring 234. The slide bar 230 engages the blade 184 and-moves this blade upwardly to'open contacts 168, 188, and to close the contacts 190, 216 as shown in Fig'I7.

Such opening of the first-mentioned'pairof con'tacts and closing of the second mentioned pair of contacts removes the motor 92 from the circuit (leaving thetimer'259 in the-circuit), and increases the energization 'of the oven toasting coils or heating elements' 40. After a predetermined time the timing mechanism'retracts the detent 1 46 to allow the latch bar to pivot counterclockwisathereby releasing the carriage toallow the carriage to rise under the action of spring 126,- and simultaneously allowingthe spring 234 to lower the sliderod 230to-allow the-intermediate switch blade 184 to drop to the positionshown in Fig. 8 with the tongue 192 suppo'rted'in thegrove 20 0. The toasting oven'thus is de-energized; and' the -m'otor remains unenergized. The stop 214 limits downward movement of the blade 210 to retain this blade'in its normal quiescent position.

As the carriage reachesits'fully *raisedpositionthe head 224 of the plunger 222 engagesbene'aththe retainer as shown in Fig. 9, and the plunger accordingly is' depressed againstthe action of its biasing-spring" 228. 'Wh'en the toasted bread slice or slices are removed from the'c'arrier76,'the spring 218 pivots the carriers '76 andthe'b'oxlike'bracket back into theposition' shown in Fig. 10." This is the'initial or quiescent position,'andthetdasternbw is ready for another toasting operation.

It now will'beap'parent'that by usingthe motor and the timer in series with theheating elements, the heating ele- 7 apparatus. Furthermore, the motor operates on a lower voltage than with the conventional connections directly across the power line, and with the correspondingly higher current. As a result, wire of a larger diameter and of a lesser number of turns is used in the motor coils. In the motor size used for motor driven toasters this reduces the cost of the motor somewhat.

An oven and timer both wound with non-magnetic resistance wire may have a resistance of 11.5 ohms when cold. The oven represents approximately 11 ohms and the timer .5 ohm of this figure. The oven and timer resistance may rise about and up to 12.7 ohms at operating temperature, drawing 1040 watts at 115 volts. The following table shows the approximate voltages across the motor and such an oven and timer for four dilferent motors energized from a 115 volt line:

Since the motor impedance is partially reactive the sum of the two voltages under any one condition exceeds the 115 volts of the supply. T 0 keep the maximum rate of temperature rise at the lowest value, the maximum, which is the initial rate, should be the same for the two steps. If the wire of the heating elements of the oven and timer came to equilibrium on the first step, that substantial equality would be achieved in the foregoing example with the 7.8 ohms motor. However, the duration of the first step is the time required for lowering the toast carriage, which may be much less than the time required for reaching substantial equilibrium. For example, in one construction the lowering time, and therefore the duration of the pre-heating step is A: to /3 second whereas the time for the wire of the oven heating element to reach substantially equilibrium temperature is several seconds.

Accordingly in that instance it is desirable to use a motor of lower impedance so as to apply a higher wattage to the oven and timer during the first step, for example the 3.1 ohm motor in the examples shown in the table.

It will be apparent that the example herein shown and described is for illustrative purposes only. Various changes may be made in the structure and form a part of the invention insofar as they fall within the spirit and scope of the appended claims.

I claim:

1. In an automatic electric toaster the combination with heating means and a reciprocal bread carrier movable into toasting and non-toasting positions relative to said heating means, of spring means biasing the carrier in non-toasting position, electric-m-otor means for moving the carrier to toasting position, a control switch for energizing and de-energizing said motor means and said heating means comprising a pair of relatively-fixed contacts and a movable contact selectively engageable with either of said pair of relatively-fixed contacts or held in an intermediate position out of engagement with both of said contacts, means on said carrier operated by insertion of a bread slice for moving said movable contact into engagement with one of said fixed contacts to energize said motor means and said heating means in series, means for moving said movable contact from said one fixed contact into engagement with said other fixed contact to de-energize said motor means while continuing energization of said heating means at a higher voltage and operable in response to movement of the carrier to toasting position,

timing means for releasing said carrier for return by said spring means to non-toasting position, and means operable upon such return to move said movable contact out of engagement with said other fixed contact into intermediate position out of engagement with both of said fixed contacts.

2. A toaster as set forth in claim 1 and further including switch means for connecting said timing means in series With the motor means and the heating means.

3. A toaster as set forth in claim 1 wherein the wattage of the heating means with the motor means in series is at least substantially 20% less than the wattage of the heating means energized at the higher voltage and with the motor means de-energizecl.

4. A toaster as set forth in claim 1 wherein the wattage of the heating means while preheating at reduced voltage with the motor in series is reduced between substantially 20% and 50% below the wattage of the heating means when energized at higher voltage with the motor means de-energized.

5. A power-operated toaster comprising a toasting oven, electric means for toasting bread in said oven, bread-carrying means, means for moving said carrying means between toasting and non-toasting positions, said moving means including electric-motor means for moving said carrying means to toasting position and spring means stressed thereby for returning said carrying means to nontoasting position, a latch for holding the carrying means in toasting position, a timer for releasing said latch, 21 pair of spaced-apart contacts, one of said contacts being connected to said motor means and the other of said contacts being connected to said electric-toasting means, said motor means and said toasting means also being electrically connected, a pair of electric input means, means connecting one of said input means to said toasting means, contact means movable between said spaced apart contacts, means connecting the other of said input means to said movable contact means, means for maintaining said movable contact means at an intermediate open-switch position out of engagement with both of said spaced-apart contact means, means operated by a slice of bread in said oven and acting on said movable contact means for moving said movable contact means from said intermediate position into engagement with one of the pair of spaced-apart contacts to connect said electric-motor means and said electric-toasting means in series between said input means, means operable upon movement of said bread-carrying means to toasting position and acting on said movable contact means for moving said movable contact means out of engagement with said one of said contacts and through said open-switch position into engagement with the other of said pair of spacedapart contacts to connect said electric-toasting means between said input means while disconnecting said electricmotor means, and means operable upon return of said bread-carrying means to non-toasting position for returning said movable contact means to said intermediate openswitch position at the end of a toasting operation.

6. A power-operated toaster as set forth in claim 5 wherein the timer is connected between the electric-toasting means and one of the input means whereby said timer is energized in series with said electric-toasting means.

References Cited in the file of this patent UNITED STATES PATENTS 2,107,388 Purpura Feb. 8, 1938 2,182,124 Guerra Dec. 5, 1939 2,266,301 Biebel Dec. 16, 1941 2,288,699 Gomersall July 7, 1942 2,288,713 Ireland July 7, 1942 2,307,347 Anderson Ian. 5, 1943 2,347,385 Wright et al. Apr. 25, 1944 2,485,456 Poole Oct. 18, 1949 2,566,904 Palmer Sept. 4,1951 2,581,975 Snyder Ian. 8, 1952 2,693,142 Ireland -.....g Nov. 2, 1954 

